Plantex Heavy Duty Tri Bolt Lock with Key & Knob for Main Door/Suitable for Double and Single Door for Home,Office,Hotel (Z - Black) Plantex tri-bolt lock is a type of locking mechanism that uses a three round bolt to secure a door in place and the bolt is typically made of brass & metal and is operated by a key or a thumb turn. Plantex tri bolt Locks are commonly used on exterior doors, such as in the front and back doors, to provide additional security. Plantex tri-Bolt Door Lock is a state-of-the-art security solution that provides added protection for your home or office. The tri-bolt design features three locking points that work together to provide superior strength and stability. This lock is easy to install and can be placed on wood & glass doors, making it a versatile option for any space. Plantex tri-bolt door lock also has a sleek and modern design that complements any home decor. which can be easily replaced for long-lasting use. It can be locked and unlocked with the use of a key or thumb turn, giving you the flexibility to choose the method that best suits your needs. Plantex is a brand that provides widest range of home improvement products. Our products are designed to ensure that you have the best experience possible when it comes to upgrading your home. Plantex strives to provide you with high-quality products that are easy on the wallet, and we are committed to helping customers find the perfect fit for their needs.